Peter Zimmer
(University of New Mexico)
13/09/2010, 10:45
Astronomical Monitoring II
Ground-Based Telescopes supported by lidar and calibrated spectrophotometry can attain levels of precision for all-sky photometry previously only attainable from space-based instruments, with uncertainties dominated by fundamental photon counting statistics and detector noise. Earth’s atmosphere is a wavelength-, directionally- and time-dependent turbid refractive element for every...
John Woodward
(NIST)
13/09/2010, 11:15
Astronomical Monitoring II
NIST has undertaken a campaign to spectrophotometrically calibrate a suite of standard stars for top-of-the-atmosphere flux to a precision of better than 1%. We will describe our experimental approach and show some preliminary results. In addition to high quality spectrophotometric measurements, this project requires precise measurements of the atmospheric transmission in both the horizontal...
